666802207676 has 24 divisors (see below), whose sum is σ = 1273009011456. Its totient is φ = 303086441520.

The previous prime is 666802207649. The next prime is 666802207691. The reversal of 666802207676 is 676702208666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3297155 + ... + 3493541.

It is an arithmetic number, because the mean of its divisors is an integer number (53042042144).

Almost surely, 2^666802207676 is an apocalyptic number.

It is an amenable number.

666802207676 is a deficient number, since it is larger than the sum of its proper divisors (606206803780).

666802207676 is a wasteful number, since it uses less digits than its factorization.

666802207676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273569 (or 273567 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 56.

It can be divided in two parts, 666802 and 207676, that added together give a palindrome (874478).

The spelling of 666802207676 in words is "six hundred sixty-six billion, eight hundred two million, two hundred seven thousand, six hundred seventy-six".